In "Return Flight," Maggie is a static character because she does not change in the story.
she changes in the story.
she helps someone else change.
she doesn't help anyone change.

she does not change in the story.

Explanation:

A static character is a character that does not change in a narration. Such character does not undergo character development and usually has a small role to play.

Therefore, in "Return Flight," Maggie is a static character because she does not change in the story.